Category: troubleshooting

Learn | Teach Open Source Technologies

SETTING UP LINUX YUM REPOSITORY IN REDHAT/CENTOS

when we implement the REDHAT based servers, when we dont have the proper license we will be facing a lot of issues for installing the softwares. So to overcome the issue we need to setup the LOCAL REPOSITORY server. this¬†¬†will eliminate the installation issues.Below i have explained how to setup the repo server step-by-step. SETTING…
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Installing Nagios core on RHEL / CENTOS 5.x – RHEL / CentOS 6.x Fedora 15/16/17/18/19/20

What is Nagios An enterprise-class monitoring and alerting solution that provides organizations with extended insight of their IT infrastructure before problems affect critical business processes. Requirements We require following things for Installing Nagios: These are Just Pre-requisites. We need them to other things work … 1. Apache and PhP (php is optional) 2. gcc, glib,…
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Postfix Mail Delivery SMTP Troubleshooting

To avoid delay in emails, specially for gmail. Just find which MX is working by issuing below commands: # dig mx gmail.com # telnet mx-IP/name 25 upon success, just see the name of first mx tried from /var/log/maillog and add an entry in /etc/hosts file. In my case, the entry is given below: # vim…
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